title: Loci of spectral unique hues throughout the life span.
abstract: Spectral unique hues (blue, green, and yellow) were determined for 50 observers ranging in age from 13 to 74 years. Each unique hue was measured at three luminance levels (0.5-log-unit steps). There were no significant changes in the spectral locations of red-green equilibrium hues (unique blue and yellow) as a function of luminance level or age. In contrast, significant shifts in unique green loci occurred as a function of both age and luminance. Unique green loci shifted toward shorter wavelengths with age. These results are consistent with the hypothesis that with advancing age there is a parallel decline in the input of all three cone types to the red-green chromatic channel and either a selective decline in short-wave-sensitive cone input to the yellow-blue chromatic channel or a change in the way in which cone signals are combined within the yellow-blue channel.
authors.affiliation: Department of Psychology, University of Colorado, Boulder, 80309.
authors.forename: B E
authors.initials: BE
authors.lastname: Schefrin
authors.forename: J S
authors.initials: JS
authors.lastname: Werner
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D003116:Color; D003118:Color Perception / Q000502:physiology*; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D008875:Middle Aged; D012044:Regression Analysis